When composing a message in 1.0RC3 with CB 1.1 and autocomplete turned on (with inside text searches enabled or disabled) after you type a few letters the spinning wheel comes up and it sits like that forever.

CB 1.1
Joomla 1.0.12
PHP 5.1
MySQL 5.0.18
Encoding ISO8859-1

Cannot confirm, maybe a DB performance problem?

Good thought, but it's not a DB performance problem. I've got my own dedicated web server and database server with no load since I haven't gone live yet. Groupjive uses autocomplete and that works fine. I'm sure it's something unique in my configuration but not sure what. Unfortunately I'm not getting any error messages.

Could you provide me a login for testing purpose please? And a step by step description how to reproduce the problem.

The website is www.castawaysclub.com. You can login as test and the password is test123. At the top of the right sidebar is a link to private messages. Then click on compose and enter terry (terrybritton is the username) or web (webmaster is the username) and you will see the problem. The wheel just spins and spins.

"Invalid password or username."